Data
Heating and air conditioning companies in Maryland
There are 3,677 heating and air conditioning companies in Maryland (CityPreferred count, October 2026). Baltimore has the most (217), then Silver Spring (106).
Reviewed October 1, 2026
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Maryland cities
| City | Companies |
|---|---|
| Baltimore | 217 |
| Silver Spring | 106 |
| Gaithersburg | 100 |
| Frederick | 98 |
| Annapolis | 85 |
| Rockville | 76 |
| Laurel | 71 |
| Columbia | 64 |
| Salisbury | 57 |
| Bowie | 56 |
| Glen Burnie | 53 |
| Waldorf | 51 |
| Westminster | 46 |
| Pasadena | 45 |
| Upper Marlboro | 44 |
| Hyattsville | 41 |
| Hagerstown | 41 |
| Ellicott City | 40 |
| Beltsville | 40 |
| Bel Air | 37 |
| Essex | 36 |
| Parkville | 35 |
| Easton | 34 |
| Mount Airy | 34 |
| Elkton | 33 |
| Germantown | 31 |
| Cumberland | 29 |
| Bethesda | 29 |
| Clinton | 29 |
| Crofton | 29 |
| Maryland City | 28 |
| Edgewater | 28 |
| Fort Washington | 27 |
| Capitol Heights | 26 |
| Temple Hills | 26 |
| Halethorpe | 25 |
| Dundalk | 24 |
| Severna Park | 24 |
| Millersville | 23 |
| Lanham | 23 |
| Jessup | 23 |
| Severn | 23 |
| Towson | 22 |
| Reisterstown | 21 |
| Elkridge | 21 |
| Mechanicsville | 21 |
| Middle River | 21 |
| Catonsville | 20 |
| Berlin | 20 |
| Joppa | 20 |
Maryland and the rest of the country
Maryland has 3,677 of the 169,801 heating and air conditioning companies in the country (2%). All states.
What is counted
Independent businesses that do this work, for homes or for businesses. Suppliers, stores and national chains are left out. Being counted does not mean a company is licensed, insured or recommended. A city is listed when it has 20 or more. How we count.
Questions and answers
- How many heating and air conditioning companies are there in Maryland?
- 3,677, by CityPreferred's count as of October 2026.
- Which Maryland city has the most?
- Baltimore, with 217, followed by Silver Spring with 106.